/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hdfs.server.namenode;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
/**
* Op codes for edits file
*/
@InterfaceAudience.Private
@InterfaceStability.Unstable
public enum FSEditLogOpCodes {
// last op code in file
OP_ADD ((byte) 0),
OP_RENAME_OLD ((byte) 1), // deprecated operation
OP_DELETE ((byte) 2),
OP_MKDIR ((byte) 3),
OP_SET_REPLICATION ((byte) 4),
@Deprecated OP_DATANODE_ADD ((byte) 5), // obsolete
@Deprecated OP_DATANODE_REMOVE((byte) 6), // obsolete
OP_SET_PERMISSIONS ((byte) 7),
OP_SET_OWNER ((byte) 8),
OP_CLOSE ((byte) 9),
OP_SET_GENSTAMP_V1 ((byte) 10),
OP_SET_NS_QUOTA ((byte) 11), // obsolete
OP_CLEAR_NS_QUOTA ((byte) 12), // obsolete
OP_TIMES ((byte) 13), // set atime, mtime
OP_SET_QUOTA ((byte) 14),
OP_RENAME ((byte) 15), // filecontext rename
OP_CONCAT_DELETE ((byte) 16), // concat files
OP_SYMLINK ((byte) 17),
OP_GET_DELEGATION_TOKEN ((byte) 18),
OP_RENEW_DELEGATION_TOKEN ((byte) 19),
OP_CANCEL_DELEGATION_TOKEN ((byte) 20),
OP_UPDATE_MASTER_KEY ((byte) 21),
OP_REASSIGN_LEASE ((byte) 22),
OP_END_LOG_SEGMENT ((byte) 23),
OP_START_LOG_SEGMENT ((byte) 24),
OP_UPDATE_BLOCKS ((byte) 25),
OP_CREATE_SNAPSHOT ((byte) 26),
OP_DELETE_SNAPSHOT ((byte) 27),
OP_RENAME_SNAPSHOT ((byte) 28),
OP_ALLOW_SNAPSHOT ((byte) 29),
OP_DISALLOW_SNAPSHOT ((byte) 30),
OP_SET_GENSTAMP_V2 ((byte) 31),
OP_ALLOCATE_BLOCK_ID ((byte) 32),
OP_ADD_BLOCK ((byte) 33),
OP_ADD_CACHE_DIRECTIVE ((byte) 34),
OP_REMOVE_CACHE_DIRECTIVE ((byte) 35),
OP_ADD_CACHE_POOL ((byte) 36),
OP_MODIFY_CACHE_POOL ((byte) 37),
OP_REMOVE_CACHE_POOL ((byte) 38),
OP_MODIFY_CACHE_DIRECTIVE ((byte) 39),
OP_SET_ACL ((byte) 40),
OP_ROLLING_UPGRADE_START ((byte) 41),
OP_ROLLING_UPGRADE_FINALIZE ((byte) 42),
// Note that the current range of the valid OP code is 0~127
OP_INVALID ((byte) -1);
private final byte opCode;
/**
* Constructor
*
* @param opCode byte value of constructed enum
*/
FSEditLogOpCodes(byte opCode) {
this.opCode = opCode;
}
/**
* return the byte value of the enum
*
* @return the byte value of the enum
*/
public byte getOpCode() {
return opCode;
}
private static final FSEditLogOpCodes[] VALUES;
static {
byte max = 0;
for (FSEditLogOpCodes code : FSEditLogOpCodes.values()) {
if (code.getOpCode() > max) {
max = code.getOpCode();
}
}
VALUES = new FSEditLogOpCodes[max + 1];
for (FSEditLogOpCodes code : FSEditLogOpCodes.values()) {
if (code.getOpCode() >= 0) {
VALUES[code.getOpCode()] = code;
}
}
}
/**
* Converts byte to FSEditLogOpCodes enum value
*
* @param opCode get enum for this opCode
* @return enum with byte value of opCode
*/
public static FSEditLogOpCodes fromByte(byte opCode) {
if (opCode >= 0 && opCode < VALUES.length) {
return VALUES[opCode];
}
return opCode == -1 ? OP_INVALID : null;
}
}